[psimem]

Ah ecco
Installato sdparm:

sdparm /dev/sda
    /dev/sda: ATA       MAXTOR STM325031  3.AA
Read write error recovery mode page:
  AWRE        1
  ARRE        0
  PER         0
Caching (SBC) mode page:
  WCE         1
  RCD         0
Control mode page:
  SWP         0

e poi:

sdparm -a /dev/sda
    /dev/sda: ATA       MAXTOR STM325031  3.AA
Read write error recovery mode page:
  AWRE        1
  ARRE        0
  TB          0
  RC          0
  EER         0
  PER         0
  DTE         0
  DCR         0
  RRC         0
  COR_S       0
  HOC         0
  DSOC        0
  WRC         0
  RTL         0
Caching (SBC) mode page:
  IC          0
  ABPF        0
  CAP         0
  DISC        0
  SIZE        0
  WCE         1
  MF          0
  RCD         0
  DRRP        0
  WRP         0
  DPTL        0
  MIPF        0
  MAPF        0
  MAPFC       0
  FSW         0
  LBCSS       0
  DRA         0
  NV_DIS      0
  NCS         0
  CSS         0
Control mode page:
  TST         0
  TMF_ONLY    0
  D_SENSE     0
  GLTSD       1
  RLEC        0
  QAM         0
  QERR        0
  RAC         0
  UA_INTLCK   0
  SWP         0
  ATO         0
  TAS         0
  AUTOLOAD    0
  BTP        -1
  ESTCT      30

sbaglio o non vedo riferimenti al DMA?